LPR: Alarm Rules

This page comprises the LPR-based alarm rules overview. To learn more about general VMS alarm rules, refer to the Alarm Rules section of the Admin Center documentation.

Overview

The LPR plugin expands the functionality of the Alarm Rules section, allowing:

  1. Filter created alarm rules by the LPR alarm type
  2. View created LPR alarm rules in the table and manage them
  3. Create new alarm rules triggered by specific LPR events, with customizable parameters to suit various operational requirements

LPR Trigger Options

The LPR plugin introduces specialized trigger options. To access them:

  1. Click the Create Rule button
  2. Select LPR in the Alarm Type parameter of the What step

This enables the following trigger conditions:

Trigger Name

Description

Restrictions

All License Plates

Triggers an alarm for every detected license plate.

  • If a selected camera (Where step) is inaccessible to a selected role (For step), no alarm is triggered. 

  • If a detection relates to a list restricted for the selected role, the information about this list is hidden, but the alarm is still triggered.

In Any List

Triggers an alarm when a detected license plate is identified with a vehicle card in any list.

  • If a selected camera (Where step) is inaccessible to a selected role (For step), no alarm is triggered.

  • If a detection matches multiple lists, only lists accessible to the selected role are included in the alarm.

  • If a detection matches the list inaccessible to the selected role, no alarm is triggered.

Out of List

Triggers an alarm when a detected license plate doesn't match a vehicle card in any list.

  • If a selected camera (Where step) is inaccessible to a selected role (For step), no alarm is triggered.

  • If a detection belongs to a list accessible to the selected role, no alarm is triggered. 

In Selected Lists

Triggers an alarm only when a detected license plate matches at least one of the predefined lists. Requires selecting the desired lists.

  • If a selected role (For step) does not have permission to access a selected list, no alarm is triggered.

  • If a license plate is associated with multiple lists, only lists selected in this option and accessible to the selected role are included in the alarm.

  • If the selected role lacks permissions for cameras linked to the selected list, no alarm is triggered.

Speed Control

Triggers an alarm when a vehicle exceeds a predefined speed threshold in at least one of the selected speed rules. Requires selecting the desired speed rules.

  • If both cameras in the speed rule are inaccessible to the selected role (For step), no alarm is triggered.

The Where step is omitted for alarm rules with the In Selected Lists and Speed Control triggers, as the cameras are already predefined within the selected list or speed rule settings.

Once the LPR alarm trigger is configured, continue with the remaining steps of alarm rule creation. For details on configuring alarm rule parameters in each step, refer to the Create Rule general guidelines.